Android ListView not showing on real device

[Szabi Zsoldos]

Hi guys,

I'm having a weird problem regarding the simple ListView.
On my emulator everything is allright and the data is loaded correctly from JSON API, the data also loads on my device.
The problem is that on my emulator, the listview is populated but on my real device, not, why ?

[peter_budo]

Without seeing actual code hard to say...

[Szabi Zsoldos]

Sorry, here it is :)

My Model:

public class ImagesModel {
    private int sapCode;
    private String imagePath;
    private int icon;

    public ImagesModel(int sapCode, String imagePath, int icon) {
        this.sapCode = sapCode;
        this.imagePath = imagePath;
        this.icon = icon;
    }

    public int getSapCode() {
        return sapCode;
    }

    public String getImagePath() {
        return imagePath;
    }

    public int getIcon() {
        return icon;
    }
}

And My Activity

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

import ro.sz.dezmembrari.sza.Config;
import ro.sz.dezmembrari.sza.JSONParser;
import ro.sz.dezmembrari.sza.R;
import ro.sz.dezmembrari.sza.model.ImagesModel;

/**
 * Created by Szabi.Zsoldos on 28/04/2015.
 */
public class ImagesListView extends Activity {

    private List<ImagesModel> myImages = new ArrayList<ImagesModel>();
    long totalSize = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.uploaded_layout);

        populateImageList();
        populateListView();
    }

    private void populateImageList() {
        new GetReportFromAPI().execute();
    }

    private void populateListView() {
        ArrayAdapter<ImagesModel> adapter = new MyListAdapter();
        ListView list = (ListView) findViewById(R.id.imagesListView);
        list.setAdapter(adapter);
        adapter.clear();
    }

    private class MyListAdapter extends ArrayAdapter<ImagesModel> {

        public MyListAdapter() {
            super(ImagesListView.this, R.layout.item_view, myImages);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // Make sure we have a view to work with
            View itemView = convertView;
            if(itemView == null) {
                itemView = getLayoutInflater().inflate(R.layout.item_view, parent, false);
            }

            // find the image to work with
            ImagesModel currentImage = myImages.get(position);

            // fill the view

            ImageView imageView = (ImageView) itemView.findViewById(R.id.item_icon);
            try {
                Picasso.with(ImagesListView.this).load(currentImage.getImagePath()).into(imageView);
            } catch(Exception e) {
                imageView.setImageResource(currentImage.getIcon());
            }

            TextView sapCode = (TextView) itemView.findViewById(R.id.item_txtSAPCode);
            sapCode.setText("" + currentImage.getSapCode());

            TextView imagePath = (TextView) itemView.findViewById(R.id.item_imagePath);
            imagePath.setText(currentImage.getImagePath());


            return itemView;
        }
    }

    private class GetReportFromAPI extends AsyncTask<String, String, JSONObject> {



        @Override
        protected JSONObject doInBackground(String... params) {
            JSONParser jParser = new JSONParser();

            // Getting JSON from URL
            JSONObject json = jParser.getJSONFromUrl(Config.REPORT_URL);
            return json;
        }

        @Override
        protected void onPostExecute(JSONObject json) {
            // showing the server response in an alert dialog
            addItemsToListView(json);
        }

    }

    private void addItemsToListView(JSONObject message) {
        try {
            JSONArray jsonArray = message.getJSONArray("android");
            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject c = jsonArray.getJSONObject(i);
                String imagePath = c.getString("path");

                try {
                    myImages.add(new ImagesModel(i, imagePath, R.drawable.mtr));
                } catch(Exception e) {
                    e.printStackTrace();
                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

[Szabi Zsoldos]

Got the problem, I've changed the layout from RelativeLayout to LinearLayout and it is all working fine.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@color/view_background"
    android:orientation="vertical"
    android:padding="10dp"
    android:weightSum="1">

    <ProgressBar
        android:id="@+id/progressBar1"
        style="@style/Base.Widget.AppCompat.ProgressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:progress="@integer/abc_config_activityShortDur"
        android:layout_centerInParent="true"
        android:maxHeight="100dp"
        android:maxWidth="100dp"
        android:minHeight="200dp"
        android:minWidth="200dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="@string/btnUploadedActivity"
        android:id="@+id/imagesListViewTitle"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imagesListView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignLeft="@+id/imagesListViewTitle"
        android:layout_below="@+id/imagesListViewTitle"
        android:smoothScrollbar="true" />
</LinearLayout>

[peter_budo]

Well done

[abu_5]

maybe it cause link of API using http not https, android consider it insecure